The Moon: The Moon -- Through the Looking Glass

SURVEYOR 3 was sent to the moon 31 months ago and was not seen again until Astronaut Richard Gordon, in lunar orbit aboard Yankee Clipper last week, spotted it through his tracking sextant. Yet NASA months ago had planned the entire Apollo 12 mission around a successful landing near Surveyor. How could the space agency know the exact location of this tiny target in the vastness of the Ocean of Storms? The answer lies in a remarkable bit of space-age detective work.

Having tracked Surveyor's flight by radar, Pasadena's Jet Propulsion Lab determined that Surveyor had landed some where in a three-square-mile...

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